Download - Year 7 Geography - Tornadoes
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Year 7 Natural Hazards
Tornadoes
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Lesson Objectives: 1. To find out where
tornadoes strike2. Where are the areas most
affected?3. How a tornado is formed?4. How are Tornadoes
measured?
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What has happened in this picture?
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Take a look at this video clip..
• Using your Q6 handsets send in three words to describe a tornado……..
Click on photo for link to YouTube
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Twister Fate
Tornados can happen at any place at any time given the right conditions. BUT, there is one country that experiences more tornadoes than any other…..
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Which Country?
A) ChinaB) USAC) Australia
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Answer: USA
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If you were a storm chaser…….• Which three states would you definitely visit
during tornado season? Use an online map of your choice to help you.
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Which 3 of the following 4 states?
A) TexasB) New YorkC) KansasD) Nebraska
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Texas,Kansas and Nebraska are of the states in Tornado Alley. All of these states are more likely to experience tornadoes rather than the state of
New York.
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Why and How?
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No 2 tornadoes are the same
BUT
They all require certain conditions to form
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Which of the following are the correct conditions particularly
required?
A) Intense or unseasonable heatB) Intense cold and high wind
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As the ground temperature increases, moist air heats and starts
to rise
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When the warm, moist air meets cold dry air, it explodes upwards, puncturing
the layer above. A thunder cloud may begin to build.
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A storm quickly develops - there may be rain, thunder and lightning.
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Upward movement of air can become very rapid. Winds from different
directions cause it to rotate.
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The vortex of winds varies in size and shape, and can be hundreds of metres wide. A
tornado can last from several seconds to more than an hour and may travel dozens of miles.
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Other forms of Tornado…
TyphoonFire Devil
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Winds within the tornado may be so fast they cannot be properly measured.
Instead, the Fujita damage scale is usedto estimate speed.
How to measure a tornado
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A Quick Quiz
Press and hold On/Off button to switch on
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What is the name of the scale used to measure tornadoes?
Please enter the response into your remotes
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Which scale of tornado has the most average frequency?
A) F0B) F1C) F2
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Answer...
F1 (which has 40%)
(F0 has 29% and F2 has 24% frequency average)
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True or False
A fire tornado is called a Fire Cyclone??
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Answer...
FalseIt is known as a Fire Devil
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What is a tornado in the sea know as?
A) TsunamiB) EarthquakeC) Typhoon
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Answer...
C: Typhoon